Cleveland C54519 Hand Tap 5/16-24 Unf Plug 4-flute Hss

Product Description

The CLEVELAND C54519 is a 5/16-24 UNF straight-flute hand tap designed for cutting internal threads in a range of ferrous and non-ferrous workpiece materials. Built from high speed steel with a bright uncoated finish, it features a plug chamfer style with four flutes and a right-hand thread direction. The overall length is 2.719 inches with a thread length of 0.69 inches. This tap is suited to bench and machine tapping operations performed by machinists, toolroom technicians, and maintenance trades working with threaded fastener applications.

The C54519 is rated for both blind hole and through-hole threading applications. It is appropriate for use in alloy steel, carbon steel, aluminum, and free-machining stainless steel workpieces. The plug chamfer makes it a general-purpose starting tap that provides controlled thread engagement from the beginning of the hole. It belongs to the Cleveland Series 1002 and carries a Class of Fit 3B with a Thread Limit of H3, making it compatible with standard UNF tolerance requirements in precision mechanical assemblies.

Key Features

• 5/16-24 UNF right-hand thread form for standard inch fastener applications
• Plug chamfer style suited to both blind hole and through-hole threading
• 4-flute straight-flute geometry for chip clearance and thread forming stability
• High speed steel construction provides wear resistance across a range of workpiece materials
• Bright uncoated finish maintains dimensional accuracy without added coating buildup
• H3 thread limit and Class 3B fit for precision tolerance control

Compatibility

Designed for use in alloy steel, carbon steel, aluminum, and free-machining stainless steel. Suitable for blind hole and through-hole threading operations requiring a 5/16-24 UNF Class 3B fit.

Installation Notes

Hand taps should be installed in a properly aligned tap wrench or machine spindle to avoid thread misalignment and tap breakage. Ensure the workpiece is securely fixtured and the pilot hole is drilled to the correct tap drill diameter for a 5/16-24 thread before beginning. Apply appropriate cutting fluid for the workpiece material, particularly when tapping steel or stainless steel. Follow standard shop safety practices and maintain back-off intervals to clear chips when tapping blind holes.